101 results found
    1. Structural Biology and Molecular Biophysics

    Characterization of the kinetic cycle of an ABC transporter by single-molecule and cryo-EM analyses

    Ling Wang et al.
    The conformational dynamics of multidrug resistance protein 1 (MRP1) are tracked in real time by single-molecule fluorescence resonance energy transfer experiments, which elucidate the rate-limiting mechanism of MRP1's transport cycle.
    1. Evolutionary Biology
    2. Microbiology and Infectious Disease

    Ribosomal mutations promote the evolution of antibiotic resistance in a multidrug environment

    James E Gomez et al.
    Mutations in several components of a bacterial ribosome are shown to broadly decrease antibiotic and stress sensitivity, and readily accessible reversion mutations allow these ribosomal mutations to serve as stepping stones to high level antibiotic resistance.
    1. Microbiology and Infectious Disease

    Impact of HIV co-infection on the evolution and transmission of multidrug-resistant tuberculosis

    Vegard Eldholm et al.
    HIV co-infection does not affect Mycobacterium tuberculosis mutation rates and does not drive the emergence of antimicrobial resistance within patients in the largest outbreak of multidrug-resistant tuberculosis in Latin America to date.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Coupling of remote alternating-access transport mechanisms for protons and substrates in the multidrug efflux pump AcrB

    Thomas Eicher et al.
    A transport mechanism is uncovered in the major drug-efflux system in E. coli involving two remote alternating-access conformational cycles, which could provide the basis for the development of allosteric inhibitors against multidrug resistance.
    1. Structural Biology and Molecular Biophysics

    An allosteric transport mechanism for the AcrAB-TolC multidrug efflux pump

    Zhao Wang et al.
    The tripartite drug efflux pump AcrA-AcrB-TolC, representative of a wide group of pumps from Gram-negative bacteria, enters a transport-competent state through long-distance conformational changes that switch the channel from a closed to an open state.
    1. Evolutionary Biology

    Compensatory evolution drives multidrug-resistant tuberculosis in Central Asia

    Matthias Merker et al.
    The genetic make-up of dominating MDR-TB clades in Central Asia is shaped by programmatic and socio-economic changes that led to fixation of resistance and bacterial fitness related mutations in the Soviet era.
    1. Evolutionary Biology
    2. Microbiology and Infectious Disease

    Evolutionary stability of collateral sensitivity to antibiotics in the model pathogen Pseudomonas aeruginosa

    Camilo Barbosa et al.
    Evolutionary trade-offs enhance efficacy of antibiotic therapy by constraining bacterial adaptation in dependence of drug order and trade-off effect size.
    1. Structural Biology and Molecular Biophysics

    Inducing conformational preference of the membrane protein transporter EmrE through conservative mutations

    Maureen Leninger et al.
    Conservative mutations within a secondary active transport protein influenced the conformational equilibrium probed using NMR spectroscopy which correlated to the functional output in vivo.
    1. Biochemistry and Chemical Biology

    De novo macrocyclic peptides dissect energy coupling of a heterodimeric ABC transporter by multimode allosteric inhibition

    Erich Stefan et al.
    By random nonstandard peptide integrated discovery, combinatorial macrocyclic peptides were leavaged that target a heterodimeric ABC transport complex and explore fundamental principles of the substrate translocation cycle.
    1. Epidemiology and Global Health
    2. Microbiology and Infectious Disease

    Systematic detection of horizontal gene transfer across genera among multidrug-resistant bacteria in a single hospital

    Daniel R Evans et al.
    Mobile genetic elements were identified and tracked as they exchanged between multidrug-resistant bacteria causing infections at a single hospital.

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